Ubuntu 13.04 debuted in April. And Ubuntu 13.10 (code-named Saucy Salamander) is expected in October 2013. Canonical’s long-term vision (starting with Ubuntu 14.04) is a single code base for smart phones, tablets and PCs. The big question mark: When will Ubuntu PC makers like System76 and ZaReason jump into the Linux tablet market? The question has multiple answers.